The official catalog description:
This course examines agile software development using Ruby on Rails. Agile development processes such as testing (at the unit, functional, and acceptance levels), refactoring, and pair programming are practiced. Various web technologies like HTML, CSS, Ajax, and RESTful interfaces are used to create interesting websites. Students are not expected to know any web technologies entering the course, but it may prove helpful.
This means:
Writing Ruby on Rails websites using agile software techniques.